Given some previous member comments, and indeed reflection on my own approach to the problem, I wasn't going to post again on this, but I'll just, if I may, comment further on this.
Are you seriously suggesting that I should accept a Penalty Fare rather than make every effort to buy a ticket? Seriously? I know you are trying to be pragmatic but the post from 'thejuggler' posted just a few minutes ago - as well as other posts in other dispute threads - indicates that appealing is not necessarily going to be any less hassle. It might well be more hassle, much more, and might not necessarily end in success. For the record, northernman was kind enough to offer me his Northern email address last year in case of further issues and we have exchanged a number of pleasant emails since - I do not ask for his email address. Neither was it a 'long' email, just an update on a long-standing issue.
The main reason for creating the thread was twofold. To make members aware that problems with some of these machines exist and secondly, to try to gauge whether it is more widespread and pass any on any information to northernman that he might find helpful. A few members have previously posted comments that suggest I am not alone, so it has been useful from that point of view. And finally, I thought the raisin d'etre of this forum was to create and reply to threads discussing railway matters?
Let's not forget, I'm not a fare evader - I'm just one of those who is honest, law-abiding and wants to pay his fare using the machines the railway provides to do so. Suggesting alternatives, however pragmatic and helpfully intentioned, will not solve this particular problem.
As I said above, I have reflected on my own approach to this and yes, perhaps after over 12 months of mainly TVM failure - my success rate has been no more than 20% - I have got a bit of a bee in my bonnet about this. Northernman is continuing his investigations and, as he has said above, will advise the forum on progress/solutions as and when. For my part I'm now going to forget the matter.